HT12E Holtek Encoder 12-Bit (for RF Remote Control)
HT12 encoders are a series of CMOS LSIs for remote control system applications. They are capable of encoding information which consists of N address bits and 12N data bits. Each address / data input can be set to one of the two logic states. The programmed addresses/data are transmitted together with the header bits via an RF or an infrared transmission medium upon receipt of a trigger signal. The capability to select a TE trigger on the HT12E or a DATA trigger on the HT12A further enhances the application flexibility of the 212 series of encoders. The HT12A additionally provides a 38kHz carrier for infrared systems.
Features
 Operating voltage: 2.4V - 12V
Case: HT12A/E: 18-pin DIP
Low power and high noise immunity CMOS technology
Low standby current: 0.1A (typ.) at VDD=5V
HT12A with a 38kHz carrier for infrared transmission medium
Minimum transmission word
Four words for the HT12E
One word for the HT12A
Built-in oscillator needs only 5% resistor
Data code has positive polarity
Minimal external components
Applications
RF Remote Control
Burglar alarm system
Smoke and fire alarm system
Garage door controllers
Car door controllers
Car alarm system
Security system
Cordless telephones
Other remote control systems |
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